Our body consist of 23 pairs of chromosomes, 22 pairs of autosomes and 1 pair of sex chromosomes (x,y).

Each chromosome pair is made of a double strand of DNA (Deoxyribonucleic acid), one we inherit one from our mother and one from our father. Chromosomes are made of long strands of genes which are the basic unit of inheritance. The gene of Huntington's disease (HD) is located on chromosome 4.

People with HD have one 'good' copy of the gene and one 'faulty' copy. When they have children, they may pass on the 'good' copy or the 'faulty' one, giving each child a 50% chance of inheriting the faulty gene.

If you inherit the faulty gene from your affected parent, at some stage, you will develop the symptoms of HD. If you inherit the 'good' gene, then you won't get the disease and none of your children will inherit the gene and develop HD.

HD is a genetic/hereditary disease that does not discriminate between genders, ethnicities or religions. It can affect people from all walks of life. The following links may assist you in finding more relevant information to understand all aspects of the disease and the support and services available for you.

• At Risk or Gene Positive
• Diagnosed or Symptomatic
• Families and Carers
• Information for Young People
• About Juvenile HD